• WordNet 3.6
    • adj Algonkian of or relating to an Algonquian tribe or its people or language
    • n Algonkian the Algonquian language spoken by the Algonkian
    • n Algonkian a member of a North American Indian people in the Ottawa river valley of Ontario and Quebec
    • ***
Webster's Revised Unabridged Dictionary
    • Algonkian (Geol) Pertaining to or designating a period or era recognized by the United States Geological Survey and some other authorities, between the Arch├Žan and the Paleozoic, from both of which it is generally separated in the record by unconformities. Algonkian rocks are both sedimentary and igneous. Although fossils are rare, life certainly existed in this period.
    • Algonkian Var. of Algonquian.
    • ***
Century Dictionary and Cyclopedia
    • Algonkian Same as Algonkin.
    • Algonkian Specifically, in geology, applied to the Precambrian rocks which are either themselves sedimentary or, if igneous, are later than known sediments.
    • ***


In literature:

This Algonkian rock is about the right stratum for centipedes to dig in.
"The Last of the Plainsmen" by Zane Grey
Purana Group - Algonkian.
"The Birth-Time of the World and Other Scientific Essays" by J. (John) Joly
The languages of the Algonkian family are as diverse as the Indo-European tongues.
"Sketch of the Mythology of the North American Indians" by John Wesley Powell
But the adjective from this noun is spelled Algonquian when applied to Indians, and Algonkian when applied to a time or period in geology.
"Boys' Book of Indian Warriors" by Edwin L. Sabin
Succeeding the Algonkian system come, in succession, the Cambrian, Ordovician, and Silurian systems.
"North America" by Israel C. Russell
They never became fur trappers in the same complete way as did the northern Algonkian and Athapaskan peoples.
"Shoshone-Bannock Subsistence and Society" by Robert F. Murphy
The Indian Meco must have met inquiries about his true name with a bubble and purr of Algonkian syllables inconvenient for English tongues.
"Wilderness of Spring" by Edgar Pangborn
In this Algonkian, Iroquoian and Siouan tribes have participated.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 4" by Various
Thus the Algonkian contains the remains of only the humblest forms of the invertebrates.
"The Elements of Geology" by William Harmon Norton